Press



' E. L. GILSON.

PRESS.

APPLICATION nuzo MAR. 6. i920 Patented Mar. 7, 1922 2 SHEETS SHEET 1.

E. L. GILSON.

PRESS.

APPLICATION FILED MAR. 6, 1920.

Patented Mar 7, 1922 2 SHEETS-SHEET 2. (a? 5 wvcmtoz UNITED STATES PATENT OFFICE.

EDWARD L. GILSON, OF ROSLINDALE, MASSACHUSETTS.

Panes.

Application filed March 6,

To all whom it may con-0cm:

Be it known that I, EDWARD LGILSON, a citizen of the United States, and a resident of Roslindale, in the county of Suffolk and State of Massachusetts, have invented an Improvement in-Presses, of which the following is a specification.

This invention relates in general to mechanical presses-and more particularly to a heavy duty general utility" press.

An object of this invention is to provide a rugged and substantial press of inexpensive construction and of highly efficient and reliable action. Another ob-ject is to improve the construction of mechanical presses so that a wide range of application is attained and so that various grades and sizes ofwork are readily accommodated. Other objects will be in part obvious or in part pointed out hereinafter. f

A preferred embodiment of the invention has been selected for purposes of illustration and description, and shown in the accompanying drawings wherein,

Figure 1 is a perspective view,- and,

Figure 2 is aside elevation ofa press embodying thisinvention.

Figure 3 is a modified form of supporting structure 5iforming one feature of this invention. i Figure 4 is a detailed View, with certain parts broken away, showing mounting. of the guiding hearings in the main frame.

Figure 5is a detailed plan on a largerv scale, with certain parts broken away, of the nut and ratchet mechanism;

Figure 6 is a cross section on line 66 of Figure 5 of the nut operating the screw, and I Figure 7. is a plan view of one of the bearin members.

Figure 8 is an elevation in plan, and,

Figure 9 is an end view of an auxiliary nut forming part of the ratchet operating mechanism.

Referring to the drawings and more particularly Figures 1 and 2, there is shown a main frame composed preferably of steel of channel cross section and preferably consisting of a single unitary piece formed into a pair of vertical members 10 and 11 having their upper ends as 12 and 13 bent so as'to be inclined toward each other. At the lower extremities of members 10 and 11 there are riveted transversely extending base shaped to fit snugly within the apex and rig- Specif cation of Letters Patent. Patented M 7 1 922 1920. Serial No. 363,804.

members 14 and 15 respectively preferably of angle iron and of sufficient lateral ex-' panse to give the main frame and its a$0- elated parts great stability. At the extreme upper portions of the inclined sections 12 and 13 the main frame is reinforced by a pair of plates 16 and 17 securely. riveted to the front andrear webs respectively of the channel frame. The vertical members 10 and 11 are braced bya horizontally extendmg member 18 preferably of channel section, thus forming a compression member of eflicient action, the member 18 being securely riveted to the vertical members 10 and 11 as by means of right angle brackets as 19 at points substantially at the base of the angularly inclined portions 12 and 13 ofthe main frame. The compression member 18 ofchannel' section is so. inserted and secured that the reinforcing webs thereof extend downwardly, leaving the plane surface of the member facing upwardly.

. .Mounted upon the upper plane face of the compression member 18 is a bearing member 20, shown more clearly in Figure 4:, suitably secured as by rivets thereto. In the apex formed by. the angularly inclined-sections 12 and13there is secureda second bearingmember 21 suitably flanged rand idly. secured to the mainframemember as by rivets. or bolts. The bearing members 20 and 21 arein alignmentand 'serveas guides-for the screw 22vprovided withakeye way 23 extending throughout its entire threaded length. The-key-way. 23 engages. the key 24 suitably secured in a key-way,

more clearly shown in Figure 7, in the guiding bearing 20, thereby to prevent rotation of the screw 22 while permitting a free movement within the guiding bearings 20 and. 21 in a direction longitudinally of the I main frame.

The screw 22 is provided witlranut 25,

more clearly shown in Figuresfi and 6, resting immediately upon the upper-[bearing surface of the bearing 20 and there is in,- terposed between the upper end or facei of the nut 25 and the lower face of the bearing member 21 a, ball or roller. thrust'bearing 26, the several parts being so proportioned as to fit snuglywithin the space between, the upper and lower faces of the bearing or guiding members-20 and 21 respectively. Referring more particularly to. Figures 5 and 6, it will be notedithatthe nut. 25 has a, substantially cylindrical outer surface in which is cut a series ofratchet teeth 27, the outer surfaces of which in turnform the bearing surface for the operating wheel con sisting preferably of the central hub 28 and, the rim 29 ,connectedthereto as byspokes 30. Tliehub 28'isprovideol with a radially extending boss 31 into thecylindricalwopening 32 of which is inserted the pawl 83 having axsubstantially radial face 34 for engage-- ment with a toothi27; of; the ratchet: on thecontrol or setting of the pawl 33. A spiral spring-38 surrounds the stem 36 and is: in-

terposecb between, the rear surface of the" pawl 33and a nut 39of special construction screwed :into the outer threaded end of the aperture-822ini the boss 31; In: Figures 8 and9is shown imoreclearly the construction ofntlie nuti39- andw lti will be noted that it is providedrwith an opening 40 forming va g111Cl1i1gb62LIlI1g for: the stem 36 and also that it is. provided with aipair of diametrically-opposed and axially extending slots;4l and 42 with which a pin:43. in the "stem 36 engages; -The diametrically opposed slots spanner. wrench-..

Referring to Figure 5, the pin 43- is shown in engagementiwith-the slot 41 which thus securely: holds the pawl 33 in the operative I position shown and which therefore will permitof-rotation of the nut 25 by thehub 28win=1an anti-clockwise direction, the spring 38=permitting the pawl 33 to recede into theopening=32 when the hub 28 is rotated in a clockwise direction, thus imparting norotation to the' nut 25;; hen it isdesired to.

' cause reverse'rotation-of the nut 25-, the

pawl i 33 is manually caused to recede into the: opening 32- and *against the spring 38 by: a withdrawal thereof by means of thehandle I 37; The pin 43is; thus withdrawn from theslot 41 whereupon the handle 37 and" its as sociated pawl 33 may be rotated through 180 to align the pin 4'3'with the diametrically opposite slot 42; Theh'andle 37 i is then released, thusplacin g the'pawl 33 in reverse relation to the ratchet teeth'27 on the nut 25'. The hub 28' may be rotated by manually grasping the rim 29 and causing a'rotation:

thereof but in order to permit of the appli-- cation of great force'a-lever 44 ofconvenint length i's inserted into the lugs 45 and46 on the hub 28- and the rim 29 respectively and in alignment: with it spoke of the wheels Suitableopenings are providedin the lugs 45 andJ46-to: permit of the bar 44to be conveniently and quickly inserted.

Referring-more particularly to Figures 1 and 2, it will be notedthat at convenient intervals in the upright members 10 and 11 there are provided bolts 47 extending through, suitable apertures in the webs of: the channel iron frame member and through corresponding openings in the straps 48 suitably spaced from the webs of the channel frame by the spacers 49 mounted on the bolts. 'iVhen the nuts on the bolts- 47 are tightened a very rigid and substantialstructure results, securelyfastening and holding the several parts together; Theupper and lower bent ends of the straps 47 areconveniently secured to the websastby bolts- 50. The spacer-S 49 mounted upo'n the boltsg47 between the Web portion of the channel frame and the strap 48-form the-1supports for-the bars 51 and 52=bridged acrossthe vertical members 1 0 and 11 upon spacers registering or corresponding in height; The bars and 52 are of great depth incomparison' to their thickness and together form a table for receiving the work, to be operated upon by the screw'22. The spacers 49*forming the supports or bearing surfaces 1 for the ends of'the bars :51*and 52 are,'by means of"- the bolts 47, each individuallysupported 9 5 uponthe=inside end thereofby the web of the channel frame and upon the outerencb thereof' -bythe strap 48, thus :offering'great V 41; and 42. also provide means for screwing the nut into place as by meansof a small resistance to the downward shearing stresses imposedgy theftable forming members 51 and 52. he height of the members 51, and

52 is readily adjustable =in thatthey may be" readily and conveniently supported on any p air of corresponding supports throughout the range ofiheight of the vertical members 1c and'll,

In Figure "3 is r shown a modified form of; supporting means for thertable membersg 51 and'52. -On-theinside face of the vertical memberslO and 11 andextending upwardly in conformity with: the 'angularl'y: inclinedi sections: 12 and 13 respectively, there issecured by a suitable number of "rivets a sup porting and reinforcing plate 53 which is of greater-Width than the channel frame and in the overlapping sections of which there is* provided: a series ofi vertically; extending openings-54; which may be punched or otherwise madein the plate, for receiving the table members or bars 51 and 52. Suchibar's are thus supported 1 on the portions 55 =intervening the successive openings Mend "it will be noted that, correspondingrto the: supporta ing means heretofore described, the; supporting ori bearing portions55 for the bars 51 and 52 are in themselves supported at two points, on the inside by: the main portion of the plate 53*. and upon the outer en'dsby means of the: strip ofimetal a forming the out sidewall ofsthe. openings 54; ThIlSiE' sup; 130

extending base member asl5 is similarly secured and riveted to the upright member thus reinforced by the supporting plate 53.

From .the foregoing it is believed that the operation of the press structure and its associated mechanisms will be clear but by way of resume it may be noted that the screw 22 is guided in its axial movement by means oi the guiding bearings 20 and 21, and is prevented il'rom rotating by means of the keyway in slidable engagement with the key 2% in the bearing member 20. The nut 25 is rotated in either direction by means of the ratchet teeth 27 and the pawl 33 and it will be noted that the ratchet driving mechanism permits oi the operation of the press within a limited space. The pitch of the thread of the screw may be suitably designed so that the force manually applied to the outer end of the bar A may be multiplied to a great extent to exert a great downward pressure or thrust by way of the lower end of the screw 2.2. In Figure l is shown the application of the press in forcing a shaft 56 into a gear 57 which is conveniently supported upon a pair of channel irons 58 placed crosswise of the table members 01 and in order to support the gear 57 at points in close proximity to the hub thereof.

The downward thrust upon the work thus supported by the table members 51 and 52 is taken up or received by the supporting studs or the supporting sections 55 of the reinforcing plate 52 (as shown in Figure 3) each of these supporting studs being individually supported at each end thereof. Such method of support obviates the chiliculties as to stresses encountered by reason of bending moments and it will be noted that the resistance to shear off the supports by the table members is doubled, permitting a corresponding increase in pressures exerted.

During the operation of the press the portions of the upright members 10 and 11 extending between the table members 51 and 52 and the'eross brace 18 are in tension only and no stresses due to bending moments are present therein. The thrust or" the screw is transmitted through the nut 25 and the roller bearing 26 to the bearing 21 rigidly secured in the apex of the angularly inclined portions 12 and 13 of the frame, thus placing the members 12 and 18 in tension. At the juncture of the portions 12 and 18 with the compression member 18 all horizontal components of the stresses within the members 12 and 13 are taken up in compression by the compression member 18, thus effectively relieving the vertical members from subjection to stresses due to bending or any tending toward distortion. it will be noted that great pressures can be actively exerted by means of the screw and nut and that by means of the construction and arrangement of parts employed, the several parts are effectively freed from objectionable stresses due to bending moments.

The operating mechanism, it will be noted, is housed withinthe space included between the apex formed by the sections 12 and 13 and the compression member 18, thus lea-ving a large space beneath the screw for the accommodation of various grades and sizes of work. It will also be noted thatithe table-members 51 and 52 are readily and conveniently adjustable to accommodatesuch varieties of work and that inthe construction of the table members a convenient space is left therebetween for the extension of parts operated upon by the screw.

The handle/l4- is readily withdrawn from the'lugs 45 and 46 on the wheel 29 so that the screw may be moved by wheel 29 in either direction, by the proper adjustment of the pawl 33, at a rapid rate, thus making for great saving in time in changing the adjustment of the several parts of the mechanism. It will also be noted that structural steel is employed of such dimensions and cross section that the maximum strength and rigidity is obtained with minimum of weight. I

It will thus be noted there has been provided in this invention a press construction in which the several objects of the invention and in which many advantages have been achieved.

As many possible embodiments of this in vention may be made and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth and shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I claim:

1. In apparatus of the class described, in combination, a single member of channel section conformed into two vertical members, pressure exerting means mounted in the upper part of said conformed member, a

sociatedwith each of said vertical members adapted to receive said table forming members.

3. Inapparatus of the class described, 1n

'combination, a pair of vertical members,

pressure exerting means mounted between the upper ends of said vertical members, a table, and a reinforcing member extending longitudinally of said vertical members, said member being provided with a series of apertures for adjustably mounting said table.

4. In apparatus of the class described, in combination, a main frame, a table adjust ably mounted 011 said frame, a non-rotatable "screw mounted, in the upper part of said frame and adapted to be moved longitudinally of'said frame, a nut in engagement with said screw having a ratchet formed on its outer cylindrical surface, an operating 1 hub enclosing said outer cylindrical surface, and a pawl mounted in said hub adapted to place said hub in operative relation to said nut, and means for operating sa1d hub.

5. In apparatus of the class described, 1n

5 combination, a main frame, a table adjustabl'y mounted on said frame, a non-rotatable screw mounted in the upper part of said frame and movable longitudinally of said frame, a nut in engagementwith said screw, a thrust bearing mounted in the upper part of said frame and in engagement with said nut to receive the upward thrust therefrom, and an operating wheel co-axial with said screw, a ratchet mechanism mounted in said wheel for connecting said wheel and said nut.

for conjoint rotation.

6. In apparatus of the class described, in

combination, a main frame, a table adjust ably mounted on said frame, a non-rotatable screw mounted in the upper part of said: 40 frame and movable longitudinally of said frame, a bearing in the upper part of said frame for guiding said screw, a nut in engagement with said screw having its outer cylindrical surface in the form ofa ratchet, a thrust bearing interposed between said guiding bearing and said nut totransmit upward thrust to said main frame, an-operating wheel enclosing saidouter oylindri-g cal surface of said nut and a pawl adapted to place said'wheel in operative relationto said nut.

7. In apparatus of theclass described, in combination, a single member formed into two vertical members and having angularly inclined upper sections forming: an apex, means mounted substantially within said apex for exerting a downward thrust, a horizontally extending compression memberconnecting saidvertical members at the base- EDWARD L. GIBSON 

